diff --git a/Tests/runtest.py b/Tests/runtest.py
index d82c7c4..e73517a 100755
--- a/Tests/runtest.py
+++ b/Tests/runtest.py
@@ -18,7 +18,7 @@ for pdb in pdbs:
   print('RUNNING '+pdb)
 
   # Run pka calculation
-  call([sys.executable, '../propka.py','pdb/'+pdb+'.pdb'], stdout = open(pdb+'.out', 'w+'))
+  call([sys.executable, '../scripts/propka31.py','pdb/'+pdb+'.pdb'], stdout = open(pdb+'.out', 'w+'))
 
   # Test pka predictiona
   result = open('results/'+pdb+'.dat','r')
diff --git a/scripts/propka.py b/scripts/propka31.py
similarity index 100%
rename from scripts/propka.py
rename to scripts/propka31.py